768 Khz distortion


#1

Decided to move from the khadas tone board with this issue. Just got the toneboard from China, very pleased with the sound quality. I wanted to try the highest possible samplingrate only to experience a lot of distortion. tried both foobar2000 and Rpi3+PiCore player to no avail. Set to highest buffersize do not help. My board came with firmware v6.F2. What to do.


#2

Hi @UffeSW, sorry to hear about your issue.

Could you PM me, or email youjun@khadas.com some audio files you used on foobar2000?

I will attempt to replicate your issue on Windows 10, foobar2000, with the Generic Tone Board.

Warmly,
You Jun


#3

Io stesso problema…


#4

Hi @UffeSW, according to our engineer, 768 khz is not supported. The highest supported sampling rate is 384 khz.


#5

Suggest you update this page then? https://www.khadas.com/tone-specs
As it currently states Sampling Frequency : PCM: Up to 768KHz @ 32bit, DSD: Up to DSD256 @ 1bit


#6

You’re right, I’ll need to discuss with the team on why 768KHz is in the spec.

Thank you for pointing that out.


#7

Perhaps also future versions of the driver would not advertise unsupported sampling rates as selectable?


#8

@PaulCoddington we’re discussing this matter with the supplier as well. Thank you for your patience.


#9

This is getting more and more strange, over at the Volumio messageboard a user tried 768 khz and 32 bit with no problems???
Link provided : https://volumio.org/forum/khadas-tone-board-t11021-50.html